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Diagnosaurus® DDx icon
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Diagnosaurus® DDx

Unbound Medicine, Inc. · Medical · United States store
NOT IN TOP 100 HERE
View on App Store ↗ Instagram card Google Play version →
Revenue a month, worldwide EST
$1.2K
Likely $395 to $3.6K
▼ 100.0% in 11 days
New ratings
Tracking
Daily counts start building from today
Rating
4.8 of 5
2.5K ratings in this store
Countries it ranks in
3
was 2 on Oct 15, 2026

Revenue

Estimated from the grossing charts of Oct 21, 2026 in the 53 countries we track, and ratings growth on the App Store.

EST. REVENUE / YEAR · WORLDWIDE
$14.2K
23 new ratings a month on average since launch
EST. LIFETIME DOWNLOADS
87.6K to 250.2K
Estimated from ratings count
WHERE ITS USERS ARE · SHARE OF RATINGS
  • United States 2.5K ratings71%
  • Canada 421 ratings12%
  • Brazil 98 ratings3%
  • Japan 95 ratings3%
  • Netherlands 88 ratings2%
  • Mexico 68 ratings2%
  • Australia 48 ratings1%
  • United Kingdom 42 ratings1%
HOW SURE ARE WE
Not in any grossing chart, so this comes from ratings growth (23 new ratings a month on average since launch): revenue grows with new ratings, more slowly for apps that collect ratings fast. Tested on 418 apps with verified revenue: typically off by about 2 times, and big earners tend to come out low. Countries we don't track (and Google Play in China, which doesn't exist) aren't included, and neither are ads or web payments. Gross revenue before store fees.
RATINGS
2.5K
AVG RATING
4.83
PRICE
Free
AGE
12.6y
LAST UPDATE
5d ago
VERSION
1.15
SIZE
19 MB
AGE RATING
17+

Last 29 days

From our daily snapshots of every grossing chart.

DAYS IN A GROSSING CHART
23 / 29
COUNTRIES NOW
1 (was 1)
EST. REVENUE A MONTH, DAILY · BOTH STORES EST
Show daily values
Sep 24, 2026not in a grossing chart
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Oct 1, 2026not in a grossing chart
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Oct 10, 2026$7K a month
Oct 11, 2026not in a grossing chart
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Oct 14, 2026not in a grossing chart
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Oct 22, 2026not in a grossing chart
The same estimate as the headline, saved every day. Best rank Sep 24, 2026: #75 Medical · MX. Now: #95 Medical · NL.

Money and momentum

Measured from the store, not estimated.

WHAT IT CHARGES
1 purchase listed
  • Diagnosaurus DDx$4.99
Top in-app purchases as listed on the App Store, in local prices.
REVIEW MOMENTUM
0.1 reviews / week
  • Trendfalling
  • Recent reviews average2.9 stars
  • Recent 1 and 2 star share50%
From the latest 52 written reviews, covering 4584 days.
RELEASE CADENCE
2 updates in 90 days
  • Typical gap between releases302 days
From the last 14 versions listed on the App Store.
RATING BREAKDOWN
2.5K ratings
5★91%
4★6%
3★2%
2★1%
1★1%

What users want

From the latest 52 reviews on the United States App Store, Apr 4, 2014 to Aug 6, 2026: 50% are 1 or 2 stars. Open a theme to read what people wrote.

WHAT THEY COMPLAIN ABOUT · SHARE OF BAD REVIEWS
Price and subscription19%

5 of the 1 and 2 star reviews.

★★★★★ I have been waiting for the upgrade now for a year but I was disappointed to know that you have to buy it again full price with no upgrade price for previous customers.
★★★★★ Scam people to rebuy your products instead of updating it?
★★★★★ I bought the standalone non subscription app to prevent downstream costs with a huge upfront cost.
No customer support12%

3 of the 1 and 2 star reviews.

★★★★★ I am not even sure who to contact.
★★★★★ I'm thinking of buying the new one but don't want to support a company that's just gonna make me buy a new and functionally identical product every few years after they make your old one obsolete.
★★★★★ There is no customer support unless it is M-F 9-5, and we all know that patients only come to the hospital during those hours.
Bugs, things not working8%

2 of the 1 and 2 star reviews.

★★★★★ Restore purchase does not work and the app is shut out of basic functionality unless you pay for it again.
★★★★★ I have to pay twice for an app that no longer works when you tap on an entry. Do not download.
Lost data, sync, backup8%

2 of the 1 and 2 star reviews.

★★★★★ Restore purchase does not work and the app is shut out of basic functionality unless you pay for it again.
★★★★★ I already bought this app how come when i clicked restore purchase it says i havent purchased it yet?????
Worse after an update8%

2 of the 1 and 2 star reviews.

★★★★★ iOS 11 comes along and they are the ONLY app publisher that didn't update their product to work in iOS 11.
★★★★★ I previously payed full price for this app and now they did some update and can't use it anymore.
WHAT THEY ASK FOR
  • Can you add or tell me where to find Irregular Heart Rhythm. 4★, Apr 6, 2018
  • Just add an edit feature so I can type in other differentials that aren't included. 4★, Jul 8, 2015
WORDS THAT KEEP COMING UP IN BAD REVIEWS

Nothing stands out.

WHAT THEY LOVE · SHARE OF GOOD REVIEWS
Useful, it helps38%

9 of the 4 and 5 star reviews.

★★★★★ For years, I have used Diagnosaurus as an aid in practice and in teaching my medical students.
★★★★★ This app is a great tool when you have patients with vague symptoms.I have found it very helpful.
★★★★★ It is user friendly and helps my everyday practice as a new provider in the ED and Family Practice.
Easy to use17%

4 of the 4 and 5 star reviews.

★★★★★ In retirement the access to current literature diminished a rapid access in my e-phone.
★★★★★ I use the app frequently to look up differential.app is easy to use and well designed .
★★★★★ This software allows for easy access to essential information quickly.
Fast17%

4 of the 4 and 5 star reviews.

★★★★★ This app is a great tool when you have patients with vague symptoms.I have found it very helpful.
★★★★★ If you have good clinical background you can go through the differentials quick and rule out etiologies in your head or make a mental asterisk next to ones that may deserve more workup/research.
★★★★★ In retirement the access to current literature diminished a rapid access in my e-phone.

Found by matching words and phrases in the reviews, not read by a person. A review can count toward more than one theme.

What users say

Latest reviews, United States App Store.

★★★★★Aug 6, 2026
.

Very useful. Clean clear interface (no barrage of popup ads).

★★★★★Jul 8, 2026
Good

I use it a lot for practicals. They want a differential diagnosis, I can think of many from this app only.

★★★★★Nov 23, 2025
Marginal

Pregnancy is listed as a disease. It is not! Poor app!

★★★★★Aug 24, 2025
Very helpful

For years, I have used Diagnosaurus as an aid in practice and in teaching my medical students.

★★★★★Aug 22, 2024
Do Not Purchase

(Review from NP student) This DDx is greatly lacking in substance and content. Many signs and symptoms are not listed and many differentials are left out.

★★★★★Sep 18, 2022
PMHNP

Great app !!

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Store screenshots

ScreenshotScreenshotScreenshotScreenshotScreenshotScreenshotScreenshotScreenshotScreenshotScreenshot

App Store ads

Apple Search Ads this app ran in the last 90 days, from Apple's public ad repository.

No App Store ads in the EU
None in the last 90 days.

Apple only publishes ads shown in the EU (EU Digital Services Act), with a 7 day delay. An app that advertises only outside the EU shows nothing here.

Growth research

Where this app is buying and earning its users. Each link opens pre filtered.

Meta Ad Library ↗Active Facebook and Instagram adsTikTok Creative Center ↗Top performing TikTok adsTikTok creators ↗Organic videos mentioning the appInstagram ↗Reels and posts under its hashtagYouTube ↗Reviews, tutorials and ShortsDeveloper site ↗Landing page and pricing

ASO keywords

Most repeated terms in the listing. Highlighted ones also appear in the title.

entries5diagnoses4organ system3see related3related ddx3ddx3professionals2diagnosaurus2quick2differential2quickly2search2organ2system2symptom2disease2see2related2feature2within2favorites2

What's new in 1.15

This update adds support for iPhone Duo and ensures full compatibility with the latest iOS 27 release, delivering a more reliable experience with improved performance and stability. We're always here to help—if you have any questions or feedback, please contact Unbound Medicine Support at support@unboundmedicine.com

Released Mar 19, 2014. Current version shipped Oct 17, 2026.

Store description

** Top-Selling App Used by Tens of Thousands of Health Professionals, Worldwide ** ABOUT DIAGNOSAURUS DDX This quick-reference tool helps healthcare professionals perform differential diagnosis with speed and confidence at the point of care. With Diagnosaurus you can quickly search over 1,000 diagnoses by organ system, symptom, or disease, or you can view all entries. Use the valuable “See Related DDx” feature within each entry to consider alternative diagnoses and quickly link to those entries. The convenient “Favorites” feature allows you to save specific searches and bookmark in your personal archive. FEATURES • More than 1,000 differential diagnoses • Highlight and make custom notes within entries • Entries organized in quick-read format • “See Related DDx” links to other potential diagnoses • Disease, symptom, and organ system indexes • “Favorites” for bookmarking important entries • Universal Index Search to help find answers fast Author: Roni F. Zeiger, MD Publisher: McGraw-Hill Medical Powered by: Unbound Medicine

See this store page in another country

Prices, ranks and reviews are per country. Revenue above is already worldwide.

United KingdomGermanyJapanBrazilIndia

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